First grow and harvest for me. It’s been really enjoyable, not as difficult as I had thought it would be mainly due to the good advice for beginners available online on websites like grow weed easy, auto flower network and also podcasts like grow from your heart. I say it’s not been too difficult but I realised that it’s also very easy to get it wrong too. None of my mistakes cost me anything more than a little yeald which is no great loss considering I now have plenty of bud to smoke, I won’t get through all of it before I grow again sometime.

If you look carefully that's not the only symptom in the pictures, the edges of your leaves are curled up. The yellow spots are most likely calcium deficiency, probably due to lock out since your feeding strength is too high.
For now either give them a light flush of give them water only.
As for the edges, increase the distance to the bulbs, since it is a sign of heat stress.